Dual fluid filter



March 3, 1931. HATCH DUAL FLUID FILTER Filed 06%. l1. 1929 ATTORNEY "is necessary to open and clean.y Y

Patented Mar. 3, 1931 UNITEDSTATS; PATENTOFFICE LEWIS HATCH, or :NEW Yoran-ri.y Y.,Ass1ei\rort 'ro WISNER MANUFACTURING coau-` j PANY, or NEW-tronic Y., Acoaroaa'rronornnw Yom; f

lDUAL FLUID'FILTER Application filed AOctober :1121, 1929.r YVSerial No. 398,903.

This vinvention krelates to liquid filtering y yarranged to ilterliquids sequentially andin the straight line of trayel of the liquids being treated. l Another ,objectv relatesto the dualarrangcment oltwosets KVof filter media, andfin the manner ofmounting whereby,v upon Vopening ofthe covers thereof, the filters andsediment compartments are instantly cleanable or re-` movable.

f Anotheruobject ofthe present. device relates to the provision of liberal filtering Vsurfaces whereby `rapid' treatment of 4 large `r`vol-V yumesoi fluid is accomplished, and duetofthe liberal ilteringsurfaces the filter mayf be operated over largev periods? of timebefore it Another object lrelates ,to the provision `or" means for draining ork 'flushing intermediate sediment compartments .during theoperation f or. the device. I f.

Another'objecto-f the present invention relates tothe utilization o-luid-tight closures or. doors `tor holdingy theVilt/er membersand associate` supportsv inoperative position.

' Infpractice the-entire interior of the ap,- paratus, which comefin: Contact with` the milk or other fluidsKV being treated, vmaybe vitreously lined in order to preventcontamination, rust and corrosion,andto'permit the apparatus to be easily cleaned and sterilized afterv each run of the fluid.

These and other objects will readily appear as the herein description proceeds, and'it will be yobvious that modificatio'nsfmaybev mavdein the herein ydescribedinvention without departing from the spiritl thereof or lthe. scope 0f the aPpended claims In the accompanying drawings: v i l Fig...lgis a perspectiveyiew showing .the opposite doors of the apparatus open, "and the ilter'members rolled vup,I slightly, Ishow'- ing,L the-screen iltersupportingmemben Fig. is a front elevationshowing the outside of one of the doors. i

. Bis an enlarged sectional view taken'Y on the line 8 3, Fig. 2, looking the direc-v tion of the arrows.

Fig.A 4 is an enlargedsectional yiew taken on the line 4-,4,"Fig.= 2, looking thedirection ofthe arrows.VVA f' fFig.' 5'Lis an enlarged sectional fragmental y View'of the doorv showing the 'relative' locations of the screen cloth and 'support member and the vitreous coating on` the Vinside surface of the door. i'

Fig. 6 is arperspectiveview'of one Of the viilter support` ymembers removed from the apparatus, as li'orcleaning.Y

'Fig. isa perspective Vviewzoffthe lower dual screen'support member.v

Y vlhe apparatus comprising fa casingpl,l Fig. l, is shown' as'supported by 2a co1umn2 which is'fsec'ured to abase 3', the body portion' of said apparatus yl Abeing formed as an open-` sided casing 4 having upperand lower fluid Y ducts comprising an inlet' connection vA into the upper opening 7 and anoutlet-,B from theflower opening 8J The lofweropening 18,

being separated lfrom` the upper'opening 7 by a partitionl, as the sectional constructionshown in Fig.v 3, hasa grooveor gutter 13 formed in its `upper surfacewhich leads 8o toa vrdrainvalve 23.` VPlural lugs 19 and 20 'A integrally 'formed onlthe outside.- of the'casl ing'4 serveas supports or loose 'hinges for vthe doors 5 and 6.; The casing4V is also`provided with a set-in removable rubber gasket 30 moldedor otherwise set to encompass the upper and lower openings to insurea fluid and air-tight closed compartment when thev doors are closed and locked.

The doors 5 and 6, shown in Figs. `l to 4 y inclusive, being rectangular in shapeand having cylindrical walls, as clearlyfshownin i Figs. A3 and 4, forma recess 9`l1kon their insides."4 The sectional portions or cross bars doors and'serve as a rest-forthe upper screenv support `members 24. They upperrecesses 9-111*l of thel doors 5 and 6 are suitably groovedto receive and hold the screens 24 in 14'ar1d l5 connect'the upright sidesiof said Y lGG lugs 17 on the door 6. Each door is also provided with lugs 21-22 to serve as coacting hinge members with the hinge lugs 19.-.20`on the casing 4.

The doors 5 and 6 are also provided with cloth strainers 27 and 28, suitably held to said doors, and they are supported against pressure by the upper metalscreens24, and supported at their lower port-ions by another metal screen 25 which is heldin the lowerV opening 8 of the casing ll.

' The lower screenmember which is com-` posed of two flat screen plates 25, Fig. 7, and suitably spaced apart by holding rods 29, form a supporting surface for the lowersec-V tion of the cloths 27 and 28. y Y The inlet A andthe outlet B of the apparatus 1 are provided with the usual pipe coupling fittings E and F. e Y

In' Figs. 3 and 4 I have shown, by arrows D, a fluid entering through the inlet A and passing downward into the upper chamber 7. Thisfiuid, being, under pressure, causes it to pass through the upper part of the screen cloths 27 and 28, into the door recesses 9 andv i1 and down through the opening C, intothe lower recesses 10 and 12, and again through the lowerpart of the screen cloths 27 and28 into the outlet chamber 8.

To facilitate cleaning, the interior of the' doors 5 and 6, the casing 4 andother inner surfaces are coated with a vitreous enamel 26, shown more clearly Fig. 5. Y

Thus, I have developed afast acting dual filter of large filtering areas, for rapid treat; ment of fluids, in volume, in which the stream of fluid to be filtered is passed through asin- @le plane filter .in reverse paths, for double ltering in sequential flow of the fluid, the first stage of filtering being of larger area than the second stage, as the first stage re'- inoves the larger quantity of residue from the fluid, so that the second stage has considerable less residue to remove.

Having thus described my invention, what I claim is:

1. In a filter of the class described a cas-V ing having therein at the opposite ends thereof inlet and `outlet ports for a fluid te be passed therethrough, one or more fiuid tight closures on said casing contacting.therewith along the edges thereof and having cross bars spanning their intermediate portions which recedev from said casingto form said iiuid passages, a fluid deflecting partition disposed in an intermediate part of said casing transversely thereto and to said closures, the edges tacting edges of said closures and said cas-A ing and between the said edges of said partition and said cross-bars, thereby causing Y said fluid, inpassing through said casing, to.

circumvent said-partition, said fluid thereby being repeatedly interceptedby said filteringmeansias it passes around each edge of said partition into and from each side fluid .-passage'ofleach closure: Said fluid deiiecting partition andf said cross-.bars having grooves in theiropposite edges for packing to provide sealed joints' atv opposite sides of said filtering means.

,"2..In a filter of the class described a casing, having therein at the opposite ends thereof inlet and outlet ports, for a fluid to be passed therethrough, a pair of doors on opposite sides of said casing, pivotally connected thereto, said doors, when closed, contacting with said casing along their edges and the lat-l eral edges of said casing, said doors having their Vintermediate portions receding from said casing, a deflecting partition, disposed in aii intermediate'part of saidV casing transe versely thereto 'and to said doors,ithe lateral edges of saidpartition facing the recesses inV said door and located in the same plane with said first mentioned edges,a pair of cloth filters reinforced by screens,one for each door, engaged between the'contacting edges of said'doors` and said casing andfcontacting with the said edgesof said partition, andv means between the edges of said doors and casing to clamp thel said doors, casing, par-V tition and filters in fluid tight engagement,

thereby causing said iiuid, in passing through said casing, to circumventsaid partition, said fluid thereby being repeatedly intercepted by said filters asit passes around each edge of said partition into and from the space ene closed by the receding portion of each door.

3. A filter, asv described, comprising an open sided casing, a fluid deflecting partition therein dividing the casing into upper and lowerchambers, inlet and outlet ports therein separated by said partition, chambered doors for closing the open sides of said casing, draining means for said upper chainber, removable filter supports in said upper and lower chambers, filter means located upon said supports, and means between the doors,'casing and partition to engage the filters therebetween in fluid tight engagement, thereby to form a plurality ofiiuid filtering and conducting passages between the inlet port and theoutlet port. i

4. A filter, as described, comprising a casing having two open sides, an interiorly located yfiuid.deflecting baffle, inlet and outlet ports in said casing, doors for closing said open sides of said casing, filter supporting screens carried by said do0rs,.lter supporting screens located in said casing below said partition,filters located on opposite sides of said casing, and means for holding said doors, n

casing and filters in fluid tight engagement.

5. The elements of claim l, said casing being disposed substantially vertically and said partition dividing the interior of said casing into two chambers, positioned one above the other, the said vertical disposition'of said casing enablinV .a fluid to pass through said filter b-y gravity.' Y ,f

6. In a filter, as described,a verticalcasing "having open sides,`inlet and outlet ports therein, doors for closing said casing in a fluid tight manner, afluid deflect-ing partition di-v viding the vertical .casing into a largeupper chamber and a lower smaller chamber, said doorsbeingrecessedtoform chambers external to the edges of the casing, filters and support means between-the door and'casing edges, at the upper large chamber, filter and supporting means between the door and casing edges," r at the lower chamber, and means for locking said doors, casing partition, filters and support means in operative fluid tight assembly.

7 In combination, a rectangular upright frame having an inlet at the top, an outlet at the bottom and an integral deflecting partition having a longitudinal drain trough in its upper face, said frame and deflecting partition having sealing grooves in-their edges, a drain cock connecting through a side of said frame with the said drain trough, closure doors hinged to said frame, said doors beingk arcuately recessed to form side fluid passages,

said doors also having integral cross bars having sealingr grooves to register with the grooves of said deflecting partition; screens arranged in spaced relation within said frame and'doors, to form a central fluid passage; andfilter cloths arranged over said screens, and through whichfluid twice passes by gravitation on its way from the inlet to the outlet 'rapid gravitational flow of fluid therethrough.

9. In combination a framehaving an inlet, an outlet and a horizontal deflecting partition having a drain trough lin its upper face, means for draining said trough, doors hinged to said frame, said doors each having an outwardly curved wall to provide an interior vertical channel vand cross bars adapted to register;

with the said deflecting partition when said` ydoors are closed and locked, screens carried on said doors and resting on said cross-bars; a double screen unit disposed between the deflecting partition and the bottom of said frame; and filter cloths arranged inside of the screens on said doors, outside of said screen unit and between said cross bars and said deflection partition so that the fluid gravitational flowfwill be. first against and through. said clothes in both its outward and inward travel through said screens.

10. In a filter, a frame having an inlet, an

outlet and a horizontal deflecting'partition,

doors each having a vertical channel and a cross bar; screens above said partition defining a central fluid passage and side fluid passages; screens below said partition; and filter lcloths disposed inside of the upper screens,

between said cross-bars and said deflecting partition, and outside of said lower screens to support said filter cloths against gravitational outflowing and inflowing thrusts, as the fluid leaves the central fluid passage above the partition, and again as it enters said central passage below the saidl partition xin its flow to the outlet. y

i l1. In a filter, a framehavingan inlet, an

outlet and afhorizontal partition'having a i drain trough; doors, each havinga vertical cross-sectionally arcuate recess in the ,inner face thereof, and a cross-barextending across the width of said recess; a set of screens' supported by said cross bars to define a central fluid passage and side fluid passages formed by the recesses in said doors; a set of'screens l occupying the space between Asaid'partition and the bottom of said frame; and filter cloths i i disposed onthe -inner sides of the `upper screens, between the cross bars and said'partition and on the outer'sides of the lower screens.

Signed at New York in the county of Newl York and State of New York this 13th day of September A. D. 1929.

. Y Lnwis HATCH,

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